jQuery(function() {
    var $ = jQuery,    // just in case. Make sure it's not an other libaray.
    
        $wrap = $('#uploader'),

        // 图片容器
        $queue = $('<ul class="filelist"></ul>')
            .appendTo( $wrap.find('.queueList') ),

        // 状态栏，包括进度和控制按钮
        $statusBar = $wrap.find('.statusBar'),

        // 文件总体选择信息。
        $info = $statusBar.find('.info'),

        // 上传按钮
        $upload = $wrap.find('.uploadBtn'),

        // 没选择文件之前的内容。
        $placeHolder = $wrap.find('.placeholder'),

        // 总体进度条
        $progress = $statusBar.find('.progress').hide(),

        // 添加的文件数量
        fileCount = 0,

        // 添加的文件总大小
        fileSize = 0,

        // 优化retina, 在retina下这个值是2
        ratio = window.devicePixelRatio || 1,

        // 缩略图大小
        thumbnailWidth = 110 * ratio,
        thumbnailHeight = 110 * ratio,

        // 可能有pedding, ready, uploading, confirm, done.
        state = 'pedding',

        // 所有文件的进度信息，key为file id
        percentages = {},

        supportTransition = (function(){
            var s = document.createElement('p').style,
                r = 'transition' in s ||
                      'WebkitTransition' in s ||
                      'MozTransition' in s ||
                      'msTransition' in s ||
                      'OTransition' in s;
            s = null;
            return r;
        })(),

        // WebUploader实例
        uploader;

    if ( !WebUploader.Uploader.support() ) {
        alert( 'Web Uploader 不支持您的浏览器！如果你使用的是IE浏览器，请尝试升级 flash 播放器');
        throw new Error( 'WebUploader does not support the browser you are using.' );
    }

    // 实例化
    $("#pic").on("shown.bs.modal",function(){
    	
       uploader = WebUploader.create({
        pick: {
            id: '#filePicker',
            label: '点击上传封面'
        },
        dnd: '#uploader .queueList',
        paste: document.body,

        accept: {
            title: 'Images',
            extensions: 'gif,jpg,jpeg,bmp,png',
            mimeTypes: 'image/*'
        },

        // swf文件路径
        swf: BASE_URL + '/Uploader.swf',

        disableGlobalDnd: true,

        chunked: true,
        // server: 'http://webuploader.duapp.com/server/fileupload.php',
        server: '../uploadBg',
        fileNumLimit: 300,
        fileSizeLimit: 5 * 1024 * 1024,    // 200 M
        fileSingleSizeLimit: 1 * 1024 * 1024    // 50 M
    	});
    // 添加“添加文件”的按钮，
       uploader.addButton({
           id: '#filePicker2',
           label: '继续添加'
       });

       // 当有文件添加进来时执行，负责view的创建
       function addFile( file ) {
           var $li = $( '<li id="' + file.id + '">' +
                   '<p class="title">' + file.name + '</p>' +
                   '<p class="imgWrap"></p>'+
                   '<p class="progress"><span></span></p>' +
                   '</li>' ),

               $btns = $('<div class="file-panel">' +
                   '<span class="cancel">删除</span>' +
                   '<span class="rotateRight">向右旋转</span>' +
                   '<span class="rotateLeft">向左旋转</span></div>').appendTo( $li ),
               $prgress = $li.find('p.progress span'),
               $wrap = $li.find( 'p.imgWrap' ),
               $info = $('<p class="error"></p>'),

               showError = function( code ) {
                   switch( code ) {
                       case 'exceed_size':
                           text = '文件大小超出';
                           break;

                       case 'interrupt':
                           text = '上传暂停';
                           break;

                       default:
                           text = '上传失败，请重试';
                           break;
                   }

                   $info.text( text ).appendTo( $li );
               };

           if ( file.getStatus() === 'invalid' ) {
               showError( file.statusText );
           } else {
               // @todo lazyload
               $wrap.text( '预览中' );
               uploader.makeThumb( file, function( error, src ) {
                   if ( error ) {
                       $wrap.text( '不能预览' );
                       return;
                   }

                   var img = $('<img src="'+src+'">');
                   $wrap.empty().append( img );
               }, thumbnailWidth, thumbnailHeight );

               percentages[ file.id ] = [ file.size, 0 ];
               file.rotation = 0;
           }

           file.on('statuschange', function( cur, prev ) {
               if ( prev === 'progress' ) {
                   $prgress.hide().width(0);
               } else if ( prev === 'queued' ) {
                   $li.off( 'mouseenter mouseleave' );
                   $btns.remove();
               }

               // 成功
               if ( cur === 'error' || cur === 'invalid' ) {
                   console.log( file.statusText );
                   showError( file.statusText );
                   percentages[ file.id ][ 1 ] = 1;
               } else if ( cur === 'interrupt' ) {
                   showError( 'interrupt' );
               } else if ( cur === 'queued' ) {
                   percentages[ file.id ][ 1 ] = 0;
               } else if ( cur === 'progress' ) {
                   $info.remove();
                   $prgress.css('display', 'block');
               } else if ( cur === 'complete' ) {
                   $li.append( '<span class="success"></span>' );
               }

               $li.removeClass( 'state-' + prev ).addClass( 'state-' + cur );
           });

           $li.on( 'mouseenter', function() {
               $btns.stop().animate({height: 30});
           });

           $li.on( 'mouseleave', function() {
               $btns.stop().animate({height: 0});
           });

           $btns.on( 'click', 'span', function() {
               var index = $(this).index(),
                   deg;

               switch ( index ) {
                   case 0:
                       uploader.removeFile( file );
                       return;

                   case 1:
                       file.rotation += 90;
                       break;

                   case 2:
                       file.rotation -= 90;
                       break;
               }

               if ( supportTransition ) {
                   deg = 'rotate(' + file.rotation + 'deg)';
                   $wrap.css({
                       '-webkit-transform': deg,
                       '-mos-transform': deg,
                       '-o-transform': deg,
                       'transform': deg
                   });
               } else {
                   $wrap.css( 'filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation='+ (~~((file.rotation/90)%4 + 4)%4) +')');
                   
               }


           });

           $li.appendTo( $queue );
       }

       // 负责view的销毁
       function removeFile( file ) {
           var $li = $('#'+file.id);

           delete percentages[ file.id ];
           updateTotalProgress();
           $li.off().find('.file-panel').off().end().remove();
       }

       function updateTotalProgress() {
           var loaded = 0,
               total = 0,
               spans = $progress.children(),
               percent;

           $.each( percentages, function( k, v ) {
               total += v[ 0 ];
               loaded += v[ 0 ] * v[ 1 ];
           } );

           percent = total ? loaded / total : 0;

           spans.eq( 0 ).text( Math.round( percent * 100 ) + '%' );
           spans.eq( 1 ).css( 'width', Math.round( percent * 100 ) + '%' );
           updateStatus();
       }

       function updateStatus() {
           var text = '', stats;

           if ( state === 'ready' ) {
               text = '选中' + fileCount + '张图片，共' +
                       WebUploader.formatSize( fileSize ) + '。';
           } else if ( state === 'confirm' ) {
               stats = uploader.getStats();
               if ( stats.uploadFailNum ) {
                   text = '已成功上传' + stats.successNum+ '张照片至服务器相册，'+
                       stats.uploadFailNum + '张照片上传失败，<a class="retry" href="#">重新上传</a>失败图片或<a class="ignore" href="#">忽略</a>'
               }

           } else {
               stats = uploader.getStats();
               text = '共' + fileCount + '张（' +
                       WebUploader.formatSize( fileSize )  +
                       '），已上传' + stats.successNum + '张';

               if ( stats.uploadFailNum ) {
                   text += '，失败' + stats.uploadFailNum + '张';
               }
           }

           $info.html( text );
       }

       function setState( val ) {
           var file, stats;

           if ( val === state ) {
               return;
           }

           $upload.removeClass( 'state-' + state );
           $upload.addClass( 'state-' + val );
           state = val;

           switch ( state ) {
               case 'pedding':
                   $placeHolder.removeClass( 'element-invisible' );
                   $queue.parent().removeClass('filled');
                   $queue.hide();
                   $statusBar.addClass( 'element-invisible' );
                   uploader.refresh();
                   break;

               case 'ready':
                   $placeHolder.addClass( 'element-invisible' );
                   $( '#filePicker2' ).removeClass( 'element-invisible');
                   $queue.parent().addClass('filled');
                   $queue.show();
                   $statusBar.removeClass('element-invisible');
                   uploader.refresh();
                   break;

               case 'uploading':
                   $( '#filePicker2' ).addClass( 'element-invisible' );
                   $progress.show();
                   $upload.text( '暂停上传' );
                   break;

               case 'paused':
                   $progress.show();
                   $upload.text( '继续上传' );
                   break;

               case 'confirm':
                   $progress.hide();
                   $upload.text( '开始上传' ).addClass( 'disabled' );
                   stats = uploader.getStats();
                   if ( stats.successNum && !stats.uploadFailNum ) {
                       setState( 'finish' );
                       return;
                   }
                   break;
               case 'finish':
                   stats = uploader.getStats();
                   if ( stats.successNum ) {
                   	//alert( '上传成功' );
                   } else {
                       // 没有成功的图片，重设
                       state = 'done';
                       location.reload();
                   }
                   break;
           }

           updateStatus();
       }

       uploader.onUploadProgress = function( file, percentage ) {
           var $li = $('#'+file.id),
               $percent = $li.find('.progress span');
           $percent.css( 'width', percentage * 100 + '%' );
           percentages[ file.id ][ 1 ] = percentage;
           updateTotalProgress();
       };

       uploader.onFileQueued = function( file ) {
           fileCount++;
           fileSize += file.size;

           if ( fileCount === 1 ) {
               $placeHolder.addClass( 'element-invisible' );
               $statusBar.show();
           }
           addFile( file );
           setState( 'ready' );
           updateTotalProgress();
       };

       uploader.onFileDequeued = function( file ) {
           fileCount--;
           fileSize -= file.size;

           if ( !fileCount ) {
               setState( 'pedding' );
           }

           removeFile( file );
           updateTotalProgress();

       };
       //上传成功后
       uploader.on('uploadSuccess',function(file,response){
       	swal("上传成功", "", "success");
       	findPicList();
       });
       
     //查找服务器图库
		var findPicList=function(){
			 $.ajax({
	                //此处使用的是自己封装的JAVA类
	                url: "../getFileList",
	                type: "POST",
	                success: function (data) {
	                    if (data.status==0) {
	                    	swal("服务器图库为空", "请上传", "error");
	                    } else {
	                     var pics='';
	                    for(var i=0;i<data.fileList.length;i++){
	                    	pics+='<a class="fancybox" href="javascript:void(0);"><img onclick="selectImgPath(this)" style="width: 190px; height: 115px;float:left;margin-right:3px;" alt="image" src="'+data.fileList[i]+'" /></a>'
	                    	}
	                    }
						$(".picsList").html(pics);
	                },
	                error: function (e) {
	                	swal("获取图片错误", "请检查接口服务", "error");
	                }
	            });
		};
       uploader.on( 'all', function( type ) {
           var stats;
           switch( type ) {
               case 'uploadFinished':
                   setState( 'confirm' );
                   break;

               case 'startUpload':
                   setState( 'uploading' );
                   break;

               case 'stopUpload':
                   setState( 'paused' );
                   break;

           }
       });

       
       uploader.onError = function( code ) {
           alert( 'Eroor: ' + code );
       };

       $upload.on('click', function() {
           if ( $(this).hasClass( 'disabled' ) ) {
               return false;
           }

           if ( state === 'ready' ) {
               uploader.upload();
           } else if ( state === 'paused' ) {
               uploader.upload();
           } else if ( state === 'uploading' ) {
               uploader.stop();
           }
       });

       $info.on( 'click', '.retry', function() {
           uploader.retry();
       } );

       $info.on( 'click', '.ignore', function() {
           alert( 'todo' );
       } );

       $upload.addClass( 'state-' + state );
       updateTotalProgress();
     });
   
    $('#pic').on('hide.bs.modal', function () {
        $("#responeseText").text("");
        uploader.destroy();
    });
    
});
